US4268701A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for producing high octane gasoline and particularly lead-free gasoline
Assignee: IFP Energies nouvelles
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Filing: 1979-09-14
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Granted: 1981-05-19
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Expires: 1999-09-14
Abstract
Abstract High octane gasoline is obtained from C3/C4 olefinic cuts by a combination of steps: oligomerization of the C3 fraction, hydroisomerization of 1-butene in the C4 cut, fractionation of the resultant C4 cut, hydrogenation of isobutene and alkylation. Resultant fractions are admixed to produce the desired high octane gasoline.
Inventors
- 👤 Quang Dang Vu
- 👤 Yves Chauvin
- 👤 Jean Gaillard
- 👤 Bernard Torck
- 👤 Michel Hellin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 19:26
CPC Classifications
C; C10; C10L; C10L1/00; C10L1/04; C10L1/06; C07; C07C; C07C2/00; C07C2/02; C07C2/04; C07C2/06; C07C2/08; C07C2/26; C07C2/30; C07C5/00; C07C5/22; C07C5/23; C07C5/25; C07C5/2506; C07C5/2556; C07C2521/00; C07C2521/02; C07C2521/04; C07C2523/00; C07C2523/38; C07C2523/40; C07C2523/44; C07C2531/00; C07C2531/02; C07C2531/12; C07C2531/14
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
215 words
A process for producing a blended high octane gasoline, which comprises the steps of: (a) oligomerizing an olefinic C 3 hydrocarbon cut comprising propylene, and recovering an oligomerizate boiling in the gasoline range; (b) hydroisomerizing an olefinic C 4 hydrocarbon cut comprising isobutene, isobutane, 1-butene and 2-butene under 1-butene isomerizing conditions, and recovering an isomerized C 4 cut having an increased proportion of 2-butene and a decreased proportion of 1-butene relative to said olefinic C 4 hydrocarbon cut; (c) fractionating the isomerized C 4 cut from step (b) and separately recovering a first fraction having an increased proportion of isobutene and isobutane relative to said isomerized C 4 cut, and a second fraction having an increased proportion of 2-butene relative to said isomerized C 4 cut; (d) hydrogenating said first fraction from step (c) under isobutene hydrogenating conditions, and recovering an effluent having an increased proportion of isobutane relative to said first fraction; (e) admixing the effluent from step (d) and said second fraction from step (c), subjecting the resultant mixture to hydrocarbon alkylation conditions, and recovering an alkylate boiling in the gasoline range; and (f) blending at least a portion of the oligomerizate from step (a) with at least a portion of the alkylate from step (e) to produce a blended high octane gasoline.
Claim 2
Dependent Claim
215 words
A process for producing a blended high octane gasoline, which comprises the steps of: (a) oligomerizing an olefinic C 3 hydrocarbon cut comprising propylene, and recovering an oligomerizate boiling in the gasoline range; (b) hydroisomerizing an olefinic C 4 hydrocarbon cut comprising isobutene, isobutane, 1-butene and 2-butene under 1-butene isomerizing conditions, and recovering an isomerized C 4 cut having an increased proportion of 2-butene and a decreased proportion of 1-butene relative to said olefinic C 4 hydrocarbon cut; (c) fractionating the isomerized C 4 cut from step (b) and separately recovering a first fraction having an increased proportion of isobutene and isobutane relative to said isomerized C 4 cut, and a second fraction having an increased proportion of 2-butene relative to said isomerized C 4 cut; (d) hydrogenating said first fraction from step (c) under isobutene hydrogenating conditions, and recovering an effluent having an increased proportion of isobutane relative to said first fraction; (e) admixing the effluent from step (d) and said second fraction from step (c), subjecting the resultant mixture to hydrocarbon alkylation conditions, and recovering an alkylate boiling in the gasoline range; and (f) blending at least a portion of the oligomerizate from step (a) with at least a portion of the alkylate from step (e) to produce a blended high octane gasoline.
Claim 3
Dependent Claim
39 words
A process according to claim 1, wherein the C 3 cut used in step (a) and the C 4 cut used in step (b) are each produced by fractional distillation of a C 3 /C 4 catalytic cracking cut.
Claim 4
Dependent Claim
34 words
A process according to claim 1, wherein the oligomerization in step (a) is effected in the presence of a catalyst obtained by contacting a group IV to VIII metal compound with an alkylaluminum compound.
Claim 5
Dependent Claim
23 words
A process according to claim 3, wherein the metal compound is a nickel compound and the alkylaluminum compound is a hydrocarbyl aluminum halide.
Claim 6
Dependent Claim
25 words
A process according to claim 1, wherein the hydroisomerization in step (b) is effected in the presence of a supported group VIII noble metal catalyst.
Claim 7
Dependent Claim
22 words
A process according to claim 5, wherein the catalyst is palladium on alumina, the catalyst being presulfided and then treated with hydrogen.
Claim 8
Dependent Claim
33 words
A process according to claim 2, wherein said C 3 /C 4 catalytic cracking cut has the following composition by weight: propylene: 15-35% isobutane: 15-30% isobutene: 5-15% 1-butene: 3-10% 2-butenes: 10-25% propane+n-butane: 8-30%
Claim 9
Dependent Claim
23 words
A process according to claim 1, wherein the alkylation in step (e) is effected in the presence of a catalyst comprising hydrofluoric acid.
Claim 10
Dependent Claim
52 words
A process according to claim 8, wherein the C 3 cut used in step (a) and the C 4 cut used in step (b) have the following respective compositions by weight: ______________________________________
C.sub.3 cut C.sub.4 cut
______________________________________
propane 15-50% n-butane 5-20%
propylene 50-85% isobutane 20-50%
isobutene 10-25%
1-butenes 5-15%
2-butenes 10-40%
______________________________________
Claim 11
Dependent Claim
47 words
A process according to claim 2, wherein said C 3 /C 4 catalytic cracking cut is subjected to hydroisomerisation under 1-butene isomerization conditions and then fractionally distilled to produce C 3 and C 4 cuts; whereby the oligomerization of the resultant C 3 cut is made easier.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-05-18 | 1984-11-17 | 1985-05-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-05-18 | 1988-11-17 | 1989-05-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-05-18 | 1992-11-17 | 1993-05-19 | $7700.00 | Window Closed / Lapsed |